lambda: Add support for invoke-interface for boxed innate lambdas
Lambda closures created with the 'create-lambda' instruction
(termed "innate lambdas") can be turned into an object with 'box-lambda'.
This CL enables support for those kinds of lambdas to work with
'invoke-interface' by generating a proxy class for the lambda.
Note: MIPS32/64 support not included.
Bug: 24618608
Bug: 25107649
Change-Id: Ic8f1bb66ebeaed4097e758a50becf1cff6ccaefb
diff --git a/runtime/arch/arm/quick_entrypoints_arm.S b/runtime/arch/arm/quick_entrypoints_arm.S
index 631b784..588268d 100644
--- a/runtime/arch/arm/quick_entrypoints_arm.S
+++ b/runtime/arch/arm/quick_entrypoints_arm.S
@@ -1045,6 +1045,26 @@
DELIVER_PENDING_EXCEPTION
END art_quick_proxy_invoke_handler
+// Forward call from boxed innate lambda to the underlying lambda closure's target method.
+ .extern artQuickLambdaProxyInvokeHandler
+ENTRY art_quick_lambda_proxy_invoke_handler
+// TODO: have a faster handler that doesn't need to set up a frame
+ SETUP_REFS_AND_ARGS_CALLEE_SAVE_FRAME_WITH_METHOD_IN_R0
+ mov r2, r9 @ pass Thread::Current
+ mov r3, sp @ pass SP
+ blx artQuickLambdaProxyInvokeHandler @ (Method* proxy method, receiver, Thread*, SP)
+ ldr r2, [r9, #THREAD_EXCEPTION_OFFSET] @ load Thread::Current()->exception_
+ // Tear down the callee-save frame. Skip arg registers.
+ add sp, #(FRAME_SIZE_REFS_AND_ARGS_CALLEE_SAVE - FRAME_SIZE_REFS_ONLY_CALLEE_SAVE)
+ .cfi_adjust_cfa_offset -(FRAME_SIZE_REFS_AND_ARGS_CALLEE_SAVE - FRAME_SIZE_REFS_ONLY_CALLEE_SAVE)
+ RESTORE_REFS_ONLY_CALLEE_SAVE_FRAME
+ cbnz r2, 1f @ success if no exception is pending
+ vmov d0, r0, r1 @ store into fpr, for when it's a fpr return...
+ bx lr @ return on success
+1:
+ DELIVER_PENDING_EXCEPTION
+END art_quick_lambda_proxy_invoke_handler
+
/*
* Called to resolve an imt conflict. r12 is a hidden argument that holds the target method's
* dex method index.